GTXbros, how are we holding up?

Imagine being a man in the past, you're running naked with your spear and you see a beautiful nude woman with an hourglass figure and beautiful big breasts. You know this woman is prime breeding material but then she bends over and a big brown smelly log exits her anus and hits the jungle floor. Any sexual attraction the man had at that moment would curl up and die and his penis would go floppy. Why didn't evolution evolve to remove the filthy anus from women?